Improvement in furnaces



UNITED STATES PATENT OFFICE.

WILLIAM ENNIS, OF NEW YORK, N. Y.

VIMPROVEMENT IN FURNACES.

. Specification forming part of Letters Patent No. 55,079, dated May 29,1866.

To all whom t may concern:

Be it known that I, WILLIAM ENNIS, of the city, county, andState of NewYork, haveinvented a new and useful Improvement in Furnaces; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making` a part of this specification, in which- Figure l is a frontView, showing the exterior of the furnace. Fig. 2 is a verticalelevation, showing the arrangement of the internal parts.

This invention relates to an improvemeutin that class of furnaeesinwhich steam is brought in contact with the burning fuelin order thatitsdecomposition may increase the combustion of the same; and it consistsin causing the steam to pass through the flame through the agency of adownward draft, by which means the steam is more evenly distributed andbrought in more intimate contact with theincandescent coal than it is inthose furnaces where the steam is passed upward through the grate.

To enable those skilled in the art to understand the construction andoperation of my invention, I will proceed to describe it with referenceto the drawings.

D represents the sides of the furnace, and E the top. c c are inclinedplates situated one at each side of the grate, which is formed of hollowbars or tubes a, containing water for the generation of steam. Thetubular grate d terminates at one end in an elevated steamchamber, F,which is either open at the top or perforated with numerous holes toallow the steam to escape into the fire-place A. Underneath the grate isthe ash-pit B, furnished with a pipe, C, through which, by the use ofsuitable machinery, an outward draft is produced, which draws the steamdownward through the burning fuel, the smoke and unconsumed steampassing into the pipe C. The fire being situated upon the hollow gratea,

steam is generated by the heat from the water contained in the tubesthereof, and passes into the tire-place A through the chamber F, and

is then drawn downward through the burning' coal by the draft of thepipe C. Its particles are thus very evenly distributed and brought incontact with the incandescent coal. This decom poses these particlesinto their elements,

the combustion of which increases the heat of the lire.

Having thus described my said invention, I will proceed to state what Iclaim as new and desire to secure by Letters Patent:

l. In afurnacehaving a downward draft, the introduction of the steamabove the grate in such manner that it may pass downward through theburning fuel and through the gra-te, substantially as and for thepurpose herein set forth.

2. The tubular steam-generating grate and the elevated steam-chamber, incombination with a chimney below the grate, substantially as and for thepurpose herein set forth.

WILLIAM ENN IS.

Witnesses f A. LECLERC, J. W. UooMBs.

